4.3 Merc I/O has starting problems Knock on start

alldodge

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Looks like you have your answer, it's the exhaust and your serial number are
Engine 0F825731
Transom 0F850775
Drive 0F707541 left_manifold_port_2.jpg
left_manifold.jpg
Right_engine.jpg
Right_engine_2.jpg
 
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DanDeltona

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Feb 13, 2016
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Hi guys,

I wanted to make sure to post enough pictures to figure out what my next step is.. A couple things I noticed while removing the exhaust/risers

1. All the bolts to remove the exhaust were maybe a half turn past hand tight. They were very easy to remove. There was only one that gave me a problem. It was in the backside of the 1st cylinder on the left side of the motor (can be seen in photo left engine). When I removed it much more force was required than was required with the other bolts. Also, when I removed this bolt grey water mixture came out. Maybe around 2-3 ounces. The bolt was also much darker the entire length of the bolt and is in the picture labeled left manifold laying across the manifold next to the shiny brass colored bolt.

2. The right manifold has a hole just inside where it connects to the engine and is labeled right manifold hole.

3. When removing the right manifold barely any water was remaining in the manifold. The left manifold contained a decent amount of water most of which was clear after the first small amount of rust orange water exhausted.

Thank you in advance for any help in figuring out the next step to repairing this boat.
 
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Bondo

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Ayuh,..... Go for the retro-fit manifolds, 'n risers kit,....

'n ya need new shutters,....
 

DanDeltona

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Feb 13, 2016
Messages
22
Thanks for the quick reply. Would I just need to replace the exhaust risers/manifolds that I removed or is more exhaust replacement necessary?
 

Bondo

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Apr 17, 2002
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71,350
Ayuh,... Those are one piece manifolds, ya need replacement 2 piece manifolds/ risers, 'n replacement shutters(post 18),...

Both sides of course,....
 

DanDeltona

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Feb 13, 2016
Messages
22
I just want to make sure I am ordering the correct parts. Would this conversion kit work for my application?
 
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